Advanced Optical Materials最新文献_第3页

Understanding the Optoelectronic Processes in Colloidal 2D Multi-Layered MAPbBr3 Perovskite Nanosheets: Funneling, Recombination and Self-Trapped Excitons 了解胶体二维多层MAPbBr3钙钛矿纳米片的光电过程：漏斗、重组和自捕获激子

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-22 DOI: 10.1002/adom.202402923

André Niebur, Eugen Klein, Rostyslav Lesyuk, Christian Klinke, Jannika Lauth

{"title":"Understanding the Optoelectronic Processes in Colloidal 2D Multi-Layered MAPbBr3 Perovskite Nanosheets: Funneling, Recombination and Self-Trapped Excitons","authors":"André Niebur, Eugen Klein, Rostyslav Lesyuk, Christian Klinke, Jannika Lauth","doi":"10.1002/adom.202402923","DOIUrl":"https://doi.org/10.1002/adom.202402923","url":null,"abstract":"Colloidal chemistry methods have made quasi 2D perovskites readily accessible. Ultrathin perovskites exhibit charge transport properties which are beneficial for solar cells and the combination of layers with different thicknesses directs charge carriers toward thicker layers with a smaller bandgap. However, detailed knowledge about the mechanisms by which excitons and charge carriers funnel and recombine in these structures is lacking. Here, colloidal 2D methylammonium lead bromide (MAPbBr3) Ruddlesden-Popper perovskites with a broad combination of layers (n = 3 to 10, and bulk fractions with n > 10) is characterized by femtosecond transient absorption spectroscopy and time-resolved photoluminescence. It is found that second- and third-order processes dominate in MAPbBr3 nanosheets, indicating exciton-exciton annihilation (EEA) and Auger recombination. Long-lived excitons in thin layers (e.g., n = 5, Eb = 136 meV) funnel into high n within 10–50 ps, which decreases their exciton binding energy below kBT and leads to radiative recombination. Parallel and consecutive funneling compete with trapping processes, making funneling an excellent tool to overcome exciton self-trapping when high-quality n-n interfaces are present. Free charge carriers in high-n regions on the other hand facilitate radiative recombination and EEA is bypassed, which is desirable for LED and lasing applications.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 12","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202402923","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low Surface Recombination Velocity and Enhanced Photocarrier Dynamics in Bi2O2Se Nanosheets Bi2O2Se 纳米片中的低表面重组速度和增强的光电载流子动力学

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202403138

Tae Gwan Park, Minsoo Kang, Eon-Taek Oh, Ayoung Ham, Kibum Kang, Fabian Rotermund

{"title":"Low Surface Recombination Velocity and Enhanced Photocarrier Dynamics in Bi2O2Se Nanosheets","authors":"Tae Gwan Park, Minsoo Kang, Eon-Taek Oh, Ayoung Ham, Kibum Kang, Fabian Rotermund","doi":"10.1002/adom.202403138","DOIUrl":"https://doi.org/10.1002/adom.202403138","url":null,"abstract":"Among 2D materials, the layered semiconductor Bi2O2Se stands out due to its unique electrostatically bonded layered structure without a van der Waals gap, making it a promising candidate for various electronic, optoelectronic, and photonic applications. This potential is largely attributed to its exceptional properties, including ultrahigh electron mobility and stability. While surface effects are known to significantly influence carrier transport in low-dimensional materials, the impact of dimensionality on photocarrier dynamics remains unexplored. In this study, ultrafast broadband pump–probe spectroscopy is utilized to directly investigate surface recombination as a key factor governing photocarrier dynamics in Bi2O2Se. The findings reveal a bulk lifetime of 1.6 ns and a surface-recombination velocity (S) of 1.84 ± 0.02 × 103 cm s−1, which is significantly lower than that observed in other unpassivated 2 and 3D semiconductors. This low S value suggests a promising avenue for enhanced photocarrier lifetime and high efficiency, even at ultrathin nanoscales. These observations provide insight into the critical role of material thickness in device performance and highlight potential advantages of surface passivation, thereby broadening the application potential of Bi2O2Se in next-generation ultrathin electronics, optoelectronics, and photonic devices.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 11","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controllable Synthesis of Se Microwires and Mixed-Dimensional Se/MoS2 Vertical Heterostructures for Nonlinear Optical Applications (Advanced Optical Materials 9/2025) 用于非线性光学应用的Se微线和混合维Se/MoS2垂直异质结构的可控合成（先进光学材料9/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202570072

Xinrui Ma, Kaiyi Wang, Chen Fan, Xuanbang Li, Yulong Hao, Jie Zhou, Xuemei Lu, Ting Shu, Lili Miao, Jin Li, Guolin Hao

引用次数: 0

Building Scalable Silicon Microring Resonator-Based Neuromorphic Photonic Circuits Using Post-Fabrication Processing with Photochromic Material 利用光致变色材料后处理技术构建可扩展硅微环谐振器神经形态光子电路

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202402706

Lei Xu, Jiawei Zhang, Eli A. Doris, Simon Bilodeau, Jesse A. Wisch, Manting Gui, Yusuf O. Jimoh, Bhavin Shastri, Barry P. Rand, Paul R. Prucnal

{"title":"Building Scalable Silicon Microring Resonator-Based Neuromorphic Photonic Circuits Using Post-Fabrication Processing with Photochromic Material","authors":"Lei Xu, Jiawei Zhang, Eli A. Doris, Simon Bilodeau, Jesse A. Wisch, Manting Gui, Yusuf O. Jimoh, Bhavin Shastri, Barry P. Rand, Paul R. Prucnal","doi":"10.1002/adom.202402706","DOIUrl":"https://doi.org/10.1002/adom.202402706","url":null,"abstract":"Neuromorphic photonics has become one of the research forefronts in photonics, with its benefits in low-latency signal processing and potential in significant energy consumption reduction when compared with digital electronics. With artificial intelligence (AI) computing accelerators in high demand, one of the high-impact research goals is to build scalable neuromorphic photonic integrated circuits which can accelerate the computing of AI models at high energy efficiency. A complete neuromorphic photonic computing system comprises seven stacks: materials, devices, circuits, microarchitecture, system architecture, algorithms, and applications. Here, we consider microring resonator (MRR)-based network designs toward building scalable silicon integrated photonic neural networks (PNN), and variations of MRR resonance wavelength from the fabrication process and their impact on PNN scalability. Further, post-fabrication processing using organic photochromic layers over the silicon platform is shown to be effective for trimming MRR resonance wavelength variation, which can significantly reduce energy consumption from the MRR-based PNN configuration. Post-fabrication processing with photochromic materials to compensate for the variation in MRR fabrication will allow a scalable silicon system on a chip without sacrificing today's performance metrics, which will be critical for the commercial viability and volume production of large-scale silicon photonic circuits.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 11","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202402706","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Efficient Non-Doped Phosphorescent Blue OLEDs with Novel Asymmetric Iridium(III) Complexes 新型不对称铱（III）配合物的高效非掺杂磷光蓝色oled

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202403273

Xin Wang, Chengcheng Wu, Kai-Ning Tong, Wei He, Kefei Shi, Siqi Li, Zhaoyun Jin, Sinyeong Jung, Zhichun Si, Youwei Yao, Guodan Wei, Feiyu Kang

{"title":"Highly Efficient Non-Doped Phosphorescent Blue OLEDs with Novel Asymmetric Iridium(III) Complexes","authors":"Xin Wang, Chengcheng Wu, Kai-Ning Tong, Wei He, Kefei Shi, Siqi Li, Zhaoyun Jin, Sinyeong Jung, Zhichun Si, Youwei Yao, Guodan Wei, Feiyu Kang","doi":"10.1002/adom.202403273","DOIUrl":"https://doi.org/10.1002/adom.202403273","url":null,"abstract":"In this study, three phenylimidazole (pmi)-based asymmetric iridium(III) complexes are successfully developed as promising emitters for non-doped blue organic light emitting diodes (OLEDs). The Ir-3 exhibited blue emission with peak located at 470 nm and a high photoluminescent quantum yield (ΦPL) of 65% in non-doped film. Single crystal X-ray diffraction analysis revealeds that Ir-3 has increased steric hindrance from bulky tert-butyl groups that effectively suppressed π–π stacking and minimized exciton quenching. The non-doped device based on Ir-3 exhibited superior electroluminescent properties, including a low turn-on voltage of 2.80 V, and achieved maximum efficiencies of external quantum efficiency (EQEmax) of 18.01%, a high power efficiency (PE) of 31.52 lm W−1, which outperform previously reported blue non-doped phosphorescent OLEDs. Moreover, Ir-3-based non-doped devices closely matched the performance of doped counterparts, demonstrating high color stability and strong emission in the blue region of emission peak of 471 nm and CIE coordinates of (0.164, 0.208). This work highlights the potential of robust Ir-3 as a promising emitter for high efficiency, stable blue OLEDs, offering a simplified, host-free device architecture that maintains performance and provides a practical path forward for next-generation display and lighting applications.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 12","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ketocyanine-Based Materials for Near Infrared-to-Visible Thermochromism (Advanced Optical Materials 9/2025) 用于近红外-可见光热致变色的酮腈基材料（先进光学材料 9/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202570071

Alex Julià López, Noel Muñoz Pérez, Ruslan Magerramov, Mar Puyol, Ferran Crugeira, Sergey Miltsov, Daniel Ruiz-Molina, Claudio Roscini

引用次数: 0

Birefringent Color Filter by Layered Metal-Organic Chalcogenides: In-Plane Anisotropy and Odd/Even Effect (Advanced Optical Materials 9/2025) 层状金属有机钙钛矿双折射彩色滤光片：平面内各向异性和奇偶效应（先进光学材料 9/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-20 DOI: 10.1002/adom.202570073

Zichao Ye, Jie Zhao, Kisung Kang, Scott J. McCormack, Yu-Tsun Shao, Mikhail Y. Efremov, André Schleife, Waltraud M. Kriven, Jian-Min Zuo, Leslie H. Allen

{"title":"Birefringent Color Filter by Layered Metal-Organic Chalcogenides: In-Plane Anisotropy and Odd/Even Effect (Advanced Optical Materials 9/2025)","authors":"Zichao Ye, Jie Zhao, Kisung Kang, Scott J. McCormack, Yu-Tsun Shao, Mikhail Y. Efremov, André Schleife, Waltraud M. Kriven, Jian-Min Zuo, Leslie H. Allen","doi":"10.1002/adom.202570073","DOIUrl":"https://doi.org/10.1002/adom.202570073","url":null,"abstract":"Organic-Inorganic Hybrid CompositesIn article 2402159, Leslie H. Allen and co-workers reveal the birefringence in large single crystal silver alkanethiolate (AgSCn), as a result of in-plane structural anisotropy. The material is a promising candidate for pixels used in intelligent display. Therefore, the cover design starts with a screen display (with picture of flowers) and a single pixel is enlarged. In each pixel, an AgSCn crystal (the atomic structure cartoon) is sandwiched between two crossed polarizers. With such setup, the color of crystal (pictures taken on real samples on the right) exhibits dramatic change from blue to orange, and to purple simply by crystal rotation. A pixelated background was added to allude to the pixels in the display.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>\u0000 </div>\u0000 </figure>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 9","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202570073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Terahertz Emitter for Pulse Shaping and Chirality Control (Advanced Optical Materials 8/2025) 用于脉冲整形和手性控制的混合太赫兹发射器（Advanced Optical Materials 8/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-13 DOI: 10.1002/adom.202570069

Weipeng Wu, Wilder Acuna, Zhixiang Huang, Xi Wang, Lars Gundlach, Matthew F. Doty, Joshua M. O. Zide, M. Benjamin Jungfleisch

引用次数: 0

Prephase-Based Reconfigurable Joint Amplitude-Phase Control Metasurface for Multifunctional Scattering Manipulation (Advanced Optical Materials 8/2025) 面向多功能散射操作的基于预相的可重构联合幅相控制超表面（Advanced Optical Materials 8/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-13 DOI: 10.1002/adom.adom202570067

Kun Duan, Chenxi Fan, Ke Chen, Tian Jiang, Junming Zhao, Yijun Feng

引用次数: 0

Stimuli-Responsive Smart Glass with Switchable Unidirectional Light Source for Enhanced Privacy/Indoor Illumination (Advanced Optical Materials 8/2025) 具有可切换单向光源的刺激响应智能玻璃，增强隐私/室内照明（Advanced Optical Materials 8/2025）